Mercurial > public > mercurial-scm > hg
diff mercurial/debugcommands.py @ 47682:78f7f0d490ee
dirstate-v2: Move fixed-size tree metadata into the docket file
Before this changeset, the dirstate-v2 data file contained not only nodes
and paths that may be reused when appending to an existing file,
but also some fixed-size metadata that applies to the entire tree
and was added at the end of the data file for every append.
This moves that metadata into the docket file, so that repeated "append"
operations without meaningful changes don?t actually need to grow any file.
Differential Revision: https://phab.mercurial-scm.org/D11098
| author | Simon Sapin <simon.sapin@octobus.net> |
|---|---|
| date | Thu, 15 Jul 2021 23:02:17 +0200 |
| parents | 096ee2e260a3 |
| children | 284a20269a97 |
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--- a/mercurial/debugcommands.py Thu Jul 08 19:23:44 2021 +0200 +++ b/mercurial/debugcommands.py Thu Jul 15 23:02:17 2021 +0200 @@ -999,11 +999,7 @@ if repo.dirstate._use_dirstate_v2: docket = repo.dirstate._map.docket hash_len = 20 # 160 bits for SHA-1 - hash_offset = docket.data_size - hash_len # hash is at the end - data_filename = docket.data_filename() - with repo.vfs(data_filename) as f: - f.seek(hash_offset) - hash_bytes = f.read(hash_len) + hash_bytes = docket.tree_metadata[-hash_len:] ui.write(binascii.hexlify(hash_bytes) + b'\n')